/* * Aic94xx SAS/SATA driver hardware interface. * * Copyright (C) 2005 Adaptec, Inc. All rights reserved. * Copyright (C) 2005 Luben Tuikov * * This file is licensed under GPLv2. * * This file is part of the aic94xx driver. * * The aic94xx driver is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; version 2 of the * License. * * The aic94xx driver is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with the aic94xx driver; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include #include #include #include #include #include "aic94xx.h" #include "aic94xx_reg.h" #include "aic94xx_hwi.h" #include "aic94xx_seq.h" #include "aic94xx_dump.h" u32 MBAR0_SWB_SIZE; /* ---------- Initialization ---------- */ static int asd_get_user_sas_addr(struct asd_ha_struct *asd_ha) { /* adapter came with a sas address */ if (asd_ha->hw_prof.sas_addr[0]) return 0; return sas_request_addr(asd_ha->sas_ha.core.shost, asd_ha->hw_prof.sas_addr); } static void asd_propagate_sas_addr(struct asd_ha_struct *asd_ha) { int i; for (i = 0; i < ASD_MAX_PHYS; i++) { if (asd_ha->hw_prof.phy_desc[i].sas_addr[0] == 0) continue; /* Set a phy's address only if it has none. */ ASD_DPRINTK("setting phy%d addr to %llx\n", i, SAS_ADDR(asd_ha->hw_prof.sas_addr)); memcpy(asd_ha->hw_prof.phy_desc[i].sas_addr, asd_ha->hw_prof.sas_addr, SAS_ADDR_SIZE); } } /* ---------- PHY initialization ---------- */ static void asd_init_phy_identify(struct asd_phy *phy) { phy->identify_frame = phy->id_frm_tok->vaddr; memset(phy->identify_frame, 0, sizeof(*phy->identify_frame)); phy->identify_frame->dev_type = SAS_END_DEV; if (phy->sas_phy.role & PHY_ROLE_INITIATOR) phy->identify_frame->initiator_bits = phy->sas_phy.iproto; if (phy->sas_phy.role & PHY_ROLE_TARGET) phy->identify_frame->target_bits = phy->sas_phy.tproto; memcpy(phy->identify_frame->sas_addr, phy->phy_desc->sas_addr, SAS_ADDR_SIZE); phy->identify_frame->phy_id = phy->sas_phy.id; } static int asd_init_phy(struct asd_phy *phy) { struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha; struct asd_sas_phy *sas_phy = &phy->sas_phy; sas_phy->enabled = 1; sas_phy->class = SAS; sas_phy->iproto = SAS_PROTOCOL_ALL; sas_phy->tproto = 0; sas_phy->type = PHY_TYPE_PHYSICAL; sas_phy->role = PHY_ROLE_INITIATOR; sas_phy->oob_mode = OOB_NOT_CONNECTED; sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; phy->id_frm_tok = asd_alloc_coherent(asd_ha, sizeof(*phy->identify_frame), GFP_KERNEL); if (!phy->id_frm_tok) { asd_printk("no mem for IDENTIFY for phy%d\n", sas_phy->id); return -ENOMEM; } else asd_init_phy_identify(phy); memset(phy->frame_rcvd, 0, sizeof(phy->frame_rcvd)); return 0; } static void asd_init_ports(struct asd_ha_struct *asd_ha) { int i; spin_lock_init(&asd_ha->asd_ports_lock); for (i = 0; i < ASD_MAX_PHYS; i++) { struct asd_port *asd_port = &asd_ha->asd_ports[i]; memset(asd_port->sas_addr, 0, SAS_ADDR_SIZE); memset(asd_port->attached_sas_addr, 0, SAS_ADDR_SIZE); asd_port->phy_mask = 0; asd_port->num_phys = 0; } } static int asd_init_phys(struct asd_ha_struct *asd_ha) { u8 i; u8 phy_mask = asd_ha->hw_prof.enabled_phys; for (i = 0; i < ASD_MAX_PHYS; i++) { struct asd_phy *phy = &asd_ha->phys[i]; phy->phy_desc = &asd_ha->hw_prof.phy_desc[i]; phy->asd_port = NULL; phy->sas_phy.enabled = 0; phy->sas_phy.id = i; phy->sas_phy.sas_addr = &phy->phy_desc->sas_addr[0]; phy->sas_phy.frame_rcvd = &phy->frame_rcvd[0]; phy->sas_phy.ha = &asd_ha->sas_ha; phy->sas_phy.lldd_phy = phy; } /* Now enable and initialize only the enabled phys. */ for_each_phy(phy_mask, phy_mask, i) { int err = asd_init_phy(&asd_ha->phys[i]); if (err) return err; } return 0; } /* ---------- Sliding windows ---------- */ static int asd_init_sw(struct asd_ha_struct *asd_ha) { struct pci_dev *pcidev = asd_ha->pcidev; int err; u32 v; /* Unlock MBARs */ err = pci_read_config_dword(pcidev, PCI_CONF_MBAR_KEY, &v); if (err) { asd_printk("couldn't access conf. space of %s\n", pci_name(pcidev)); goto Err; } if (v) err = pci_write_config_dword(pcidev, PCI_CONF_MBAR_KEY, v); if (err) { asd_printk("couldn't write to MBAR_KEY of %s\n", pci_name(pcidev)); goto Err; } /* Set sliding windows A, B and C to point to proper internal * memory regions. */ pci_write_config_dword(pcidev, PCI_CONF_MBAR0_SWA, REG_BASE_ADDR); pci_write_config_dword(pcidev, PCI_CONF_MBAR0_SWB, REG_BASE_ADDR_CSEQCIO); pci_write_config_dword(pcidev, PCI_CONF_MBAR0_SWC, REG_BASE_ADDR_EXSI); asd_ha->io_handle[0].swa_base = REG_BASE_ADDR; asd_ha->io_handle[0].swb_base = REG_BASE_ADDR_CSEQCIO; asd_ha->io_handle[0].swc_base = REG_BASE_ADDR_EXSI; MBAR0_SWB_SIZE = asd_ha->io_handle[0].len - 0x80; if (!asd_ha->iospace) { /* MBAR1 will point to OCM (On Chip Memory) */ pci_write_config_dword(pcidev, PCI_CONF_MBAR1, OCM_BASE_ADDR); asd_ha->io_handle[1].swa_base = OCM_BASE_ADDR; } spin_lock_init(&asd_ha->iolock); Err: return err; } /* ---------- SCB initialization ---------- */ /** * asd_init_scbs - manually allocate the first SCB. * @asd_ha: pointer to host adapter structure * * This allocates the very first SCB which would be sent to the * sequencer for execution. Its bus address is written to * CSEQ_Q_NEW_POINTER, mode page 2, mode 8. Since the bus address of * the _next_ scb to be DMA-ed to the host adapter is read from the last * SCB DMA-ed to the host adapter, we have to always stay one step * ahead of the sequencer and keep one SCB already allocated. */ static int asd_init_scbs(struct asd_ha_struct *asd_ha) { struct asd_seq_data *seq = &asd_ha->seq; int bitmap_bytes; /* allocate the index array and bitmap */ asd_ha->seq.tc_index_bitmap_bits = asd_ha->hw_prof.max_scbs; asd_ha->seq.tc_index_array = kzalloc(asd_ha->seq.tc_index_bitmap_bits* sizeof(void *), GFP_KERNEL); if (!asd_ha->seq.tc_index_array) return -ENOMEM; bitmap_bytes = (asd_ha->seq.tc_index_bitmap_bits+7)/8; bitmap_bytes = BITS_TO_LONGS(bitmap_bytes*8)*sizeof(unsigned long); asd_ha->seq.tc_index_bitmap = kzalloc(bitmap_bytes, GFP_KERNEL); if (!asd_ha->seq.tc_index_bitmap) return -ENOMEM; spin_lock_init(&seq->tc_index_lock); seq->next_scb.size = sizeof(struct scb); seq->next_scb.vaddr = dma_pool_alloc(asd_ha->scb_pool, GFP_KERNEL, &seq->next_scb.dma_handle); if (!seq->next_scb.vaddr) { kfree(asd_ha->seq.tc_index_bitmap); kfree(asd_ha->seq.tc_index_array); asd_ha->seq.tc_index_bitmap = NULL; asd_ha->seq.tc_index_array = NULL; return -ENOMEM; } seq->pending = 0; spin_lock_init(&seq->pend_q_lock); INIT_LIST_HEAD(&seq->pend_q); return 0; } static void asd_get_max_scb_ddb(struct asd_ha_struct *asd_ha) { asd_ha->hw_prof.max_scbs = asd_get_cmdctx_size(asd_ha)/ASD_SCB_SIZE; asd_ha->hw_prof.max_ddbs = asd_get_devctx_size(asd_ha)/ASD_DDB_SIZE; ASD_DPRINTK("max_scbs:%d, max_ddbs:%d\n", asd_ha->hw_prof.max_scbs, asd_ha->hw_prof.max_ddbs); } /* ---------- Done List initialization ---------- */ static void asd_dl_tasklet_handler(unsigned long); static int asd_init_dl(struct asd_ha_struct *asd_ha) { asd_ha->seq.actual_dl = asd_alloc_coherent(asd_ha, ASD_DL_SIZE * sizeof(struct done_list_struct), GFP_KERNEL); if (!asd_ha->seq.actual_dl) return -ENOMEM; asd_ha->seq.dl = asd_ha->seq.actual_dl->vaddr; asd_ha->seq.dl_toggle = ASD_DEF_DL_TOGGLE; asd_ha->seq.dl_next = 0; tasklet_init(&asd_ha->seq.dl_tasklet, asd_dl_tasklet_handler, (unsigned long) asd_ha); return 0; } /* ---------- EDB and ESCB init ---------- */ static int asd_alloc_edbs(struct asd_ha_struct *asd_ha, gfp_t gfp_flags) { struct asd_seq_data *seq = &asd_ha->seq; int i; seq->edb_arr = kmalloc(seq->num_edbs*sizeof(*seq->edb_arr), gfp_flags); if (!seq->edb_arr) return -ENOMEM; for (i = 0; i < seq->num_edbs; i++) { seq->edb_arr[i] = asd_alloc_coherent(asd_ha, ASD_EDB_SIZE, gfp_flags); if (!seq->edb_arr[i]) goto Err_unroll; memset(seq->edb_arr[i]->vaddr, 0, ASD_EDB_SIZE); } ASD_DPRINTK("num_edbs:%d\n", seq->num_edbs); return 0; Err_unroll: for (i-- ; i >= 0; i--) asd_free_coherent(asd_ha, seq->edb_arr[i]); kfree(seq->edb_arr); seq->edb_arr = NULL; return -ENOMEM; } static int asd_alloc_escbs(struct asd_ha_struct *asd_ha, gfp_t gfp_flags) { struct asd_seq_data *seq = &asd_ha->seq; struct asd_ascb *escb; int i, escbs; seq->escb_arr = kmalloc(seq->num_escbs*sizeof(*seq->escb_arr), gfp_flags); if (!seq->escb_arr) return -ENOMEM; escbs = seq->num_escbs; escb = asd_ascb_alloc_list(asd_ha, &escbs, gfp_flags); if (!escb) { asd_printk("couldn't allocate list of escbs\n"); goto Err; } seq->num_escbs -= escbs; /* subtract what was not allocated */ ASD_DPRINTK("num_escbs:%d\n", seq->num_escbs); for (i = 0; i < seq->num_escbs; i++, escb = list_entry(escb->list.next, struct asd_ascb, list)) { seq->escb_arr[i] = escb; escb->scb->header.opcode = EMPTY_SCB; } return 0; Err: kfree(seq->escb_arr); seq->escb_arr = NULL; return -ENOMEM; } static void asd_assign_edbs2escbs(struct asd_ha_struct *asd_ha) { struct asd_seq_data *seq = &asd_ha->seq; int i, k, z = 0; for (i = 0; i < seq->num_escbs; i++) { struct asd_ascb *ascb = seq->escb_arr[i]; struct empty_scb *escb = &ascb->scb->escb; ascb->edb_index = z; escb->num_valid = ASD_EDBS_PER_SCB; for (k = 0; k < ASD_EDBS_PER_SCB; k++) { struct sg_el *eb = &escb->eb[k]; struct asd_dma_tok *edb = seq->edb_arr[z++]; memset(eb, 0, sizeof(*eb)); eb->bus_addr = cpu_to_le64(((u64) edb->dma_handle)); eb->size = cpu_to_le32(((u32) edb->size)); } } } /** * asd_init_escbs -- allocate and initialize empty scbs * @asd_ha: pointer to host adapter structure * * An empty SCB has sg_elements of ASD_EDBS_PER_SCB (7) buffers. * They transport sense data, etc. */ static int asd_init_escbs(struct asd_ha_struct *asd_ha) { struct asd_seq_data *seq = &asd_ha->seq; int err = 0; /* Allocate two empty data buffers (edb) per sequencer. */ int edbs = 2*(1+asd_ha->hw_prof.num_phys); seq->num_escbs = (edbs+ASD_EDBS_PER_SCB-1)/ASD_EDBS_PER_SCB; seq->num_edbs = seq->num_escbs * ASD_EDBS_PER_SCB; err = asd_alloc_edbs(asd_ha, GFP_KERNEL); if (err) { asd_printk("couldn't allocate edbs\n"); return err; } err = asd_alloc_escbs(asd_ha, GFP_KERNEL); if (err) { asd_printk("couldn't allocate escbs\n"); return err; } asd_assign_edbs2escbs(asd_ha); /* In order to insure that normal SCBs do not overfill sequencer * memory and leave no space for escbs (halting condition), * we increment pending here by the number of escbs. However, * escbs are never pending. */ seq->pending = seq->num_escbs; seq->can_queue = 1 + (asd_ha->hw_prof.max_scbs - seq->pending)/2; return 0; } /* ---------- HW initialization ---------- */ /** * asd_chip_hardrst -- hard reset the chip * @asd_ha: pointer to host adapter structure * * This takes 16 cycles and is synchronous to CFCLK, which runs * at 200 MHz, so this should take at most 80 nanoseconds. */ int asd_chip_hardrst(struct asd_ha_struct *asd_ha) { int i; int count = 100; u32 reg; for (i = 0 ; i < 4 ; i++) { asd_write_reg_dword(asd_ha, COMBIST, HARDRST); } do { udelay(1); reg = asd_read_reg_dword(asd_ha, CHIMINT); if (reg & HARDRSTDET) { asd_write_reg_dword(asd_ha, CHIMINT, HARDRSTDET|PORRSTDET); return 0; } } while (--count > 0); return -ENODEV; } /** * asd_init_chip -- initialize the chip * @asd_ha: pointer to host adapter structure * * Hard resets the chip, disables HA interrupts, downloads the sequnecer * microcode and starts the sequencers. The caller has to explicitly * enable HA interrupts with asd_enable_ints(asd_ha). */ static int asd_init_chip(struct asd_ha_struct *asd_ha) { int err; err = asd_chip_hardrst(asd_ha); if (err) { asd_printk("couldn't hard reset %s\n", pci_name(asd_ha->pcidev)); goto out; } asd_disable_ints(asd_ha); err = asd_init_seqs(asd_ha); if (err) { asd_printk("couldn't init seqs for %s\n", pci_name(asd_ha->pcidev)); goto out; } err = asd_start_seqs(asd_ha); if (err) { asd_printk("coudln't start seqs for %s\n", pci_name(asd_ha->pcidev)); goto out; } out: return err; } #define MAX_DEVS ((OCM_MAX_SIZE) / (ASD_DDB_SIZE)) static int max_devs = 0; module_param_named(max_devs, max_devs, int, S_IRUGO); MODULE_PARM_DESC(max_devs, "\n" "\tMaximum number of SAS devices to support (not LUs).\n" "\tDefault: 2176, Maximum: 65663.\n"); static int max_cmnds = 0; module_param_named(max_cmnds, max_cmnds, int, S_IRUGO); MODULE_PARM_DESC(max_cmnds, "\n" "\tMaximum number of commands queuable.\n" "\tDefault: 512, Maximum: 66047.\n"); static void asd_extend_devctx_ocm(struct asd_ha_struct *asd_ha) { unsigned long dma_addr = OCM_BASE_ADDR; u32 d; dma_addr -= asd_ha->hw_prof.max_ddbs * ASD_DDB_SIZE; asd_write_reg_addr(asd_ha, DEVCTXBASE, (dma_addr_t) dma_addr); d = asd_read_reg_dword(asd_ha, CTXDOMAIN); d |= 4; asd_write_reg_dword(asd_ha, CTXDOMAIN, d); asd_ha->hw_prof.max_ddbs += MAX_DEVS; } static int asd_extend_devctx(struct asd_ha_struct *asd_ha) { dma_addr_t dma_handle; unsigned long dma_addr; u32 d; int size; asd_extend_devctx_ocm(asd_ha); asd_ha->hw_prof.ddb_ext = NULL; if (max_devs <= asd_ha->hw_prof.max_ddbs || max_devs > 0xFFFF) { max_devs = asd_ha->hw_prof.max_ddbs; return 0; } size = (max_devs - asd_ha->hw_prof.max_ddbs + 1) * ASD_DDB_SIZE; asd_ha->hw_prof.ddb_ext = asd_alloc_coherent(asd_ha, size, GFP_KERNEL); if (!asd_ha->hw_prof.ddb_ext) { asd_printk("couldn't allocate memory for %d devices\n", max_devs); max_devs = asd_ha->hw_prof.max_ddbs; return -ENOMEM; } dma_handle = asd_ha->hw_prof.ddb_ext->dma_handle; dma_addr = ALIGN((unsigned long) dma_handle, ASD_DDB_SIZE); dma_addr -= asd_ha->hw_prof.max_ddbs * ASD_DDB_SIZE; dma_handle = (dma_addr_t) dma_addr; asd_write_reg_addr(asd_ha, DEVCTXBASE, dma_handle); d = asd_read_reg_dword(asd_ha, CTXDOMAIN); d &= ~4; asd_write_reg_dword(asd_ha, CTXDOMAIN, d); asd_ha->hw_prof.max_ddbs = max_devs; return 0; } static int asd_extend_cmdctx(struct asd_ha_struct *asd_ha) { dma_addr_t dma_handle; unsigned long dma_addr; u32 d; int size; asd_ha->hw_prof.scb_ext = NULL; if (max_cmnds <= asd_ha->hw_prof.max_scbs || max_cmnds > 0xFFFF) { max_cmnds = asd_ha->hw_prof.max_scbs; return 0; } size = (max_cmnds - asd_ha->hw_prof.max_scbs + 1) * ASD_SCB_SIZE; asd_ha->hw_prof.scb_ext = asd_alloc_coherent(asd_ha, size, GFP_KERNEL); if (!asd_ha->hw_prof.scb_ext) { asd_printk("couldn't allocate memory for %d commands\n", max_cmnds); max_cmnds = asd_ha->hw_prof.max_scbs; return -ENOMEM; } dma_handle = asd_ha->hw_prof.scb_ext->dma_handle; dma_addr = ALIGN((unsigned long) dma_handle, ASD_SCB_SIZE); dma_addr -= asd_ha->hw_prof.max_scbs * ASD_SCB_SIZE; dma_handle = (dma_addr_t) dma_addr; asd_write_reg_addr(asd_ha, CMDCTXBASE, dma_handle); d = asd_read_reg_dword(asd_ha, CTXDOMAIN); d &= ~1; asd_write_reg_dword(asd_ha, CTXDOMAIN, d); asd_ha->hw_prof.max_scbs = max_cmnds; return 0; } /** * asd_init_ctxmem -- initialize context memory * asd_ha: pointer to host adapter structure * * This function sets the maximum number of SCBs and * DDBs which can be used by the sequencer. This is normally * 512 and 128 respectively. If support for more SCBs or more DDBs * is required then CMDCTXBASE, DEVCTXBASE and CTXDOMAIN are * initialized here to extend context memory to point to host memory, * thus allowing unlimited support for SCBs and DDBs -- only limited * by host memory. */ static int asd_init_ctxmem(struct asd_ha_struct *asd_ha) { int bitmap_bytes; asd_get_max_scb_ddb(asd_ha); asd_extend_devctx(asd_ha); asd_extend_cmdctx(asd_ha); /* The kernel wants bitmaps to be unsigned long sized. */ bitmap_bytes = (asd_ha->hw_prof.max_ddbs+7)/8; bitmap_bytes = BITS_TO_LONGS(bitmap_bytes*8)*sizeof(unsigned long); asd_ha->hw_prof.ddb_bitmap = kzalloc(bitmap_bytes, GFP_KERNEL); if (!asd_ha->hw_prof.ddb_bitmap) return -ENOMEM; spin_lock_init(&asd_ha->hw_prof.ddb_lock); return 0; } int asd_init_hw(struct asd_ha_struct *asd_ha) { int err; u32 v; err = asd_init_sw(asd_ha); if (err) return err; err = pci_read_config_dword(asd_ha->pcidev, PCIC_HSTPCIX_CNTRL, &v); if (err) { asd_printk("couldn't read PCIC_HSTPCIX_CNTRL of %s\n", pci_name(asd_ha->pcidev)); return err; } pci_write_config_dword(asd_ha->pcidev, PCIC_HSTPCIX_CNTRL, v | SC_TMR_DIS); if (err) { asd_printk("couldn't disable split completion timer of %s\n", pci_name(asd_ha->pcidev)); return err; } err = asd_read_ocm(asd_ha); if (err) { asd_printk("couldn't read ocm(%d)\n", err); /* While suspicios, it is not an error that we * couldn't read the OCM. */ } err = asd_read_flash(asd_ha); if (err) { asd_printk("couldn't read flash(%d)\n", err); /* While suspicios, it is not an error that we * couldn't read FLASH memory. */ } asd_init_ctxmem(asd_ha); if (asd_get_user_sas_addr(asd_ha)) { asd_printk("No SAS Address provided for %s\n", pci_name(asd_ha->pcidev)); err = -ENODEV; goto Out; } asd_propagate_sas_addr(asd_ha); err = asd_init_phys(asd_ha); if (err) { asd_printk("couldn't initialize phys for %s\n", pci_name(asd_ha->pcidev)); goto Out; } asd_init_ports(asd_ha); err = asd_init_scbs(asd_ha); if (err) { asd_printk("couldn't initialize scbs for %s\n", pci_name(asd_ha->pcidev)); goto Out; } err = asd_init_dl(asd_ha); if (err) { asd_printk("couldn't initialize the done list:%d\n", err); goto Out; } err = asd_init_escbs(asd_ha); if (err) { asd_printk("couldn't initialize escbs\n"); goto Out; } err = asd_init_chip(asd_ha); if (err) { asd_printk("couldn't init the chip\n"); goto Out; } Out: return err; } /* ---------- Chip reset ---------- */ /** * asd_chip_reset -- reset the host adapter, etc * @asd_ha: pointer to host adapter structure of interest * * Called from the ISR. Hard reset the chip. Let everything * timeout. This should be no different than hot-unplugging the * host adapter. Once everything times out we'll init the chip with * a call to asd_init_chip() and enable interrupts with asd_enable_ints(). * XXX finish. */ static void asd_chip_reset(struct asd_ha_struct *asd_ha) { struct sas_ha_struct *sas_ha = &asd_ha->sas_ha; ASD_DPRINTK("chip reset for %s\n", pci_name(asd_ha->pcidev)); asd_chip_hardrst(asd_ha); sas_ha->notify_ha_event(sas_ha, HAE_RESET); } /* ---------- Done List Routines ---------- */ static void asd_dl_tasklet_handler(unsigned long data) { struct asd_ha_struct *asd_ha = (struct asd_ha_struct *) data; struct asd_seq_data *seq = &asd_ha->seq; unsigned long flags; while (1) { struct done_list_struct *dl = &seq->dl[seq->dl_next]; struct asd_ascb *ascb; if ((dl->toggle & DL_TOGGLE_MASK) != seq->dl_toggle) break; /* find the aSCB */ spin_lock_irqsave(&seq->tc_index_lock, flags); ascb = asd_tc_index_find(seq, (int)le16_to_cpu(dl->index)); spin_unlock_irqrestore(&seq->tc_index_lock, flags); if (unlikely(!ascb)) { ASD_DPRINTK("BUG:sequencer:dl:no ascb?!\n"); goto next_1; } else if (ascb->scb->header.opcode == EMPTY_SCB) { goto out; } else if (!ascb->uldd_timer && !del_timer(&ascb->timer)) { goto next_1; } spin_lock_irqsave(&seq->pend_q_lock, flags); list_del_init(&ascb->list); seq->pending--; spin_unlock_irqrestore(&seq->pend_q_lock, flags); out: ascb->tasklet_complete(ascb, dl); next_1: seq->dl_next = (seq->dl_next + 1) & (ASD_DL_SIZE-1); if (!seq->dl_next) seq->dl_toggle ^= DL_TOGGLE_MASK; } } /* ---------- Interrupt Service Routines ---------- */ /** * asd_process_donelist_isr -- schedule processing of done list entries * @asd_ha: pointer to host adapter structure */ static void asd_process_donelist_isr(struct asd_ha_struct *asd_ha) { tasklet_schedule(&asd_ha->seq.dl_tasklet); } /** * asd_com_sas_isr -- process device communication interrupt (COMINT) * @asd_ha: pointer to host adapter structure */ static void asd_com_sas_isr(struct asd_ha_struct *asd_ha) { u32 comstat = asd_read_reg_dword(asd_ha, COMSTAT); /* clear COMSTAT int */ asd_write_reg_dword(asd_ha, COMSTAT, 0xFFFFFFFF); if (comstat & CSBUFPERR) { asd_printk("%s: command/status buffer dma parity error\n", pci_name(asd_ha->pcidev)); } else if (comstat & CSERR) { int i; u32 dmaerr = asd_read_reg_dword(asd_ha, DMAERR); dmaerr &= 0xFF; asd_printk("%s: command/status dma error, DMAERR: 0x%02x, " "CSDMAADR: 0x%04x, CSDMAADR+4: 0x%04x\n", pci_name(asd_ha->pcidev), dmaerr, asd_read_reg_dword(asd_ha, CSDMAADR), asd_read_reg_dword(asd_ha, CSDMAADR+4)); asd_printk("CSBUFFER:\n"); for (i = 0; i < 8; i++) { asd_printk("%08x %08x %08x %08x\n", asd_read_reg_dword(asd_ha, CSBUFFER), asd_read_reg_dword(asd_ha, CSBUFFER+4), asd_read_reg_dword(asd_ha, CSBUFFER+8), asd_read_reg_dword(asd_ha, CSBUFFER+12)); } asd_dump_seq_state(asd_ha, 0); } else if (comstat & OVLYERR) { u32 dmaerr = asd_read_reg_dword(asd_ha, DMAERR); dmaerr = (dmaerr >> 8) & 0xFF; asd_printk("%s: overlay dma error:0x%x\n", pci_name(asd_ha->pcidev), dmaerr); } asd_chip_reset(asd_ha); } static void asd_arp2_err(struct asd_ha_struct *asd_ha, u32 dchstatus) { static const char *halt_code[256] = { "UNEXPECTED_INTERRUPT0", "UNEXPECTED_INTERRUPT1", "UNEXPECTED_INTERRUPT2", "UNEXPECTED_INTERRUPT3", "UNEXPECTED_INTERRUPT4", "UNEXPECTED_INTERRUPT5", "UNEXPECTED_INTERRUPT6", "UNEXPECTED_INTERRUPT7", "UNEXPECTED_INTERRUPT8", "UNEXPECTED_INTERRUPT9", "UNEXPECTED_INTERRUPT10", [11 ... 19] = "unknown[11,19]", "NO_FREE_SCB_AVAILABLE", "INVALID_SCB_OPCODE", "INVALID_MBX_OPCODE", "INVALID_ATA_STATE", "ATA_QUEUE_FULL", "ATA_TAG_TABLE_FAULT", "ATA_TAG_MASK_FAULT", "BAD_LINK_QUEUE_STATE", "DMA2CHIM_QUEUE_ERROR", "EMPTY_SCB_LIST_FULL", "unknown[30]", "IN_USE_SCB_ON_FREE_LIST", "BAD_OPEN_WAIT_STATE", "INVALID_STP_AFFILIATION", "unknown[34]", "EXEC_QUEUE_ERROR", "TOO_MANY_EMPTIES_NEEDED", "EMPTY_REQ_QUEUE_ERROR", "Q_MONIRTT_MGMT_ERROR", "TARGET_MODE_FLOW_ERROR", "DEVICE_QUEUE_NOT_FOUND", "START_IRTT_TIMER_ERROR", "ABORT_TASK_ILLEGAL_REQ", [43 ... 255] = "unknown[43,255]" }; if (dchstatus & CSEQINT) { u32 arp2int = asd_read_reg_dword(asd_ha, CARP2INT); if (arp2int & (ARP2WAITTO|ARP2ILLOPC|ARP2PERR|ARP2CIOPERR)) { asd_printk("%s: CSEQ arp2int:0x%x\n", pci_name(asd_ha->pcidev), arp2int); } else if (arp2int & ARP2HALTC) asd_printk("%s: CSEQ halted: %s\n", pci_name(asd_ha->pcidev), halt_code[(arp2int>>16)&0xFF]); else asd_printk("%s: CARP2INT:0x%x\n", pci_name(asd_ha->pcidev), arp2int); } if (dchstatus & LSEQINT_MASK) { int lseq; u8 lseq_mask = dchstatus & LSEQINT_MASK; for_each_sequencer(lseq_mask, lseq_mask, lseq) { u32 arp2int = asd_read_reg_dword(asd_ha, LmARP2INT(lseq)); if (arp2int & (ARP2WAITTO | ARP2ILLOPC | ARP2PERR | ARP2CIOPERR)) { asd_printk("%s: LSEQ%d arp2int:0x%x\n", pci_name(asd_ha->pcidev), lseq, arp2int); /* XXX we should only do lseq reset */ } else if (arp2int & ARP2HALTC) asd_printk("%s: LSEQ%d halted: %s\n", pci_name(asd_ha->pcidev), lseq,halt_code[(arp2int>>16)&0xFF]); else asd_printk("%s: LSEQ%d ARP2INT:0x%x\n", pci_name(asd_ha->pcidev), lseq, arp2int); } } asd_chip_reset(asd_ha); } /** * asd_dch_sas_isr -- process device channel interrupt (DEVINT) * @asd_ha: pointer to host adapter structure */ static void asd_dch_sas_isr(struct asd_ha_struct *asd_ha) { u32 dchstatus = asd_read_reg_dword(asd_ha, DCHSTATUS); if (dchstatus & CFIFTOERR) { asd_printk("%s: CFIFTOERR\n", pci_name(asd_ha->pcidev)); asd_chip_reset(asd_ha); } else asd_arp2_err(asd_ha, dchstatus); } /** * ads_rbi_exsi_isr -- process external system interface interrupt (INITERR) * @asd_ha: pointer to host adapter structure */ static void asd_rbi_exsi_isr(struct asd_ha_struct *asd_ha) { u32 stat0r = asd_read_reg_dword(asd_ha, ASISTAT0R); if (!(stat0r & ASIERR)) { asd_printk("hmm, EXSI interrupted but no error?\n"); return; } if (stat0r & ASIFMTERR) { asd_printk("ASI SEEPROM format error for %s\n", pci_name(asd_ha->pcidev)); } else if (stat0r & ASISEECHKERR) { u32 stat1r = asd_read_reg_dword(asd_ha, ASISTAT1R); asd_printk("ASI SEEPROM checksum 0x%x error for %s\n", stat1r & CHECKSUM_MASK, pci_name(asd_ha->pcidev)); } else { u32 statr = asd_read_reg_dword(asd_ha, ASIERRSTATR); if (!(statr & CPI2ASIMSTERR_MASK)) { ASD_DPRINTK("hmm, ASIERR?\n"); return; } else { u32 addr = asd_read_reg_dword(asd_ha, ASIERRADDR); u32 data = asd_read_reg_dword(asd_ha, ASIERRDATAR); asd_printk("%s: CPI2 xfer err: addr: 0x%x, wdata: 0x%x, " "count: 0x%x, byteen: 0x%x, targerr: 0x%x " "master id: 0x%x, master err: 0x%x\n", pci_name(asd_ha->pcidev), addr, data, (statr & CPI2ASIBYTECNT_MASK) >> 16, (statr & CPI2ASIBYTEEN_MASK) >> 12, (statr & CPI2ASITARGERR_MASK) >> 8, (statr & CPI2ASITARGMID_MASK) >> 4, (statr & CPI2ASIMSTERR_MASK)); } } asd_chip_reset(asd_ha); } /** * asd_hst_pcix_isr -- process host interface interrupts * @asd_ha: pointer to host adapter structure * * Asserted on PCIX errors: target abort, etc. */ static void asd_hst_pcix_isr(struct asd_ha_struct *asd_ha) { u16 status; u32 pcix_status; u32 ecc_status; pci_read_config_word(asd_ha->pcidev, PCI_STATUS, &status); pci_read_config_dword(asd_ha->pcidev, PCIX_STATUS, &pcix_status); pci_read_config_dword(asd_ha->pcidev, ECC_CTRL_STAT, &ecc_status); if (status & PCI_STATUS_DETECTED_PARITY) asd_printk("parity error for %s\n", pci_name(asd_ha->pcidev)); else if (status & PCI_STATUS_REC_MASTER_ABORT) asd_printk("master abort for %s\n", pci_name(asd_ha->pcidev)); else if (status & PCI_STATUS_REC_TARGET_ABORT) asd_printk("target abort for %s\n", pci_name(asd_ha->pcidev)); else if (status & PCI_STATUS_PARITY) asd_printk("data parity for %s\n", pci_name(asd_ha->pcidev)); else if (pcix_status & RCV_SCE) { asd_printk("received split completion error for %s\n", pci_name(asd_ha->pcidev)); pci_write_config_dword(asd_ha->pcidev,PCIX_STATUS,pcix_status); /* XXX: Abort task? */ return; } else if (pcix_status & UNEXP_SC) { asd_printk("unexpected split completion for %s\n", pci_name(asd_ha->pcidev)); pci_write_config_dword(asd_ha->pcidev,PCIX_STATUS,pcix_status); /* ignore */ return; } else if (pcix_status & SC_DISCARD) asd_printk("split completion discarded for %s\n", pci_name(asd_ha->pcidev)); else if (ecc_status & UNCOR_ECCERR) asd_printk("uncorrectable ECC error for %s\n", pci_name(asd_ha->pcidev)); asd_chip_reset(asd_ha); } /** * asd_hw_isr -- host adapter interrupt service routine * @irq: ignored * @dev_id: pointer to host adapter structure * * The ISR processes done list entries and level 3 error handling. */ irqreturn_t asd_hw_isr(int irq, void *dev_id) { struct asd_ha_struct *asd_ha = dev_id; u32 chimint = asd_read_reg_dword(asd_ha, CHIMINT); if (!chimint) return IRQ_NONE; asd_write_reg_dword(asd_ha, CHIMINT, chimint); (void) asd_read_reg_dword(asd_ha, CHIMINT); if (chimint & DLAVAIL) asd_process_donelist_isr(asd_ha); if (chimint & COMINT) asd_com_sas_isr(asd_ha); if (chimint & DEVINT) asd_dch_sas_isr(asd_ha); if (chimint & INITERR) asd_rbi_exsi_isr(asd_ha); if (chimint & HOSTERR) asd_hst_pcix_isr(asd_ha); return IRQ_HANDLED; } /* ---------- SCB handling ---------- */ static struct asd_ascb *asd_ascb_alloc(struct asd_ha_struct *asd_ha, gfp_t gfp_flags) { extern struct kmem_cache *asd_ascb_cache; struct asd_seq_data *seq = &asd_ha->seq; struct asd_ascb *ascb; unsigned long flags; ascb = kmem_cache_zalloc(asd_ascb_cache, gfp_flags); if (ascb) { ascb->dma_scb.size = sizeof(struct scb); ascb->dma_scb.vaddr = dma_pool_alloc(asd_ha->scb_pool, gfp_flags, &ascb->dma_scb.dma_handle); if (!ascb->dma_scb.vaddr) { kmem_cache_free(asd_ascb_cache, ascb); return NULL; } memset(ascb->dma_scb.vaddr, 0, sizeof(struct scb)); asd_init_ascb(asd_ha, ascb); spin_lock_irqsave(&seq->tc_index_lock, flags); ascb->tc_index = asd_tc_index_get(seq, ascb); spin_unlock_irqrestore(&seq->tc_index_lock, flags); if (ascb->tc_index == -1) goto undo; ascb->scb->header.index = cpu_to_le16((u16)ascb->tc_index); } return ascb; undo: dma_pool_free(asd_ha->scb_pool, ascb->dma_scb.vaddr, ascb->dma_scb.dma_handle); kmem_cache_free(asd_ascb_cache, ascb); ASD_DPRINTK("no index for ascb\n"); return NULL; } /** * asd_ascb_alloc_list -- allocate a list of aSCBs * @asd_ha: pointer to host adapter structure * @num: pointer to integer number of aSCBs * @gfp_flags: GFP_ flags. * * This is the only function which is used to allocate aSCBs. * It can allocate one or many. If more than one, then they form * a linked list in two ways: by their list field of the ascb struct * and by the next_scb field of the scb_header. * * Returns NULL if no memory was available, else pointer to a list * of ascbs. When this function returns, @num would be the number * of SCBs which were not able to be allocated, 0 if all requested * were able to be allocated. */ struct asd_ascb *asd_ascb_alloc_list(struct asd_ha_struct *asd_ha, int *num, gfp_t gfp_flags) { struct asd_ascb *first = NULL; for ( ; *num > 0; --*num) { struct asd_ascb *ascb = asd_ascb_alloc(asd_ha, gfp_flags); if (!ascb) break; else if (!first) first = ascb; else { struct asd_ascb *last = list_entry(first->list.prev, struct asd_ascb, list); list_add_tail(&ascb->list, &first->list); last->scb->header.next_scb = cpu_to_le64(((u64)ascb->dma_scb.dma_handle)); } } return first; } /** * asd_swap_head_scb -- swap the head scb * @asd_ha: pointer to host adapter structure * @ascb: pointer to the head of an ascb list * * The sequencer knows the DMA address of the next SCB to be DMAed to * the host adapter, from initialization or from the last list DMAed. * seq->next_scb keeps the address of this SCB. The sequencer will * DMA to the host adapter this list of SCBs. But the head (first * element) of this list is not known to the sequencer. Here we swap * the head of the list with the known SCB (memcpy()). * Only one memcpy() is required per list so it is in our interest * to keep the list of SCB as long as possible so that the ratio * of number of memcpy calls to the number of SCB DMA-ed is as small * as possible. * * LOCKING: called with the pending list lock held. */ static void asd_swap_head_scb(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb) { struct asd_seq_data *seq = &asd_ha->seq; struct asd_ascb *last = list_entry(ascb->list.prev, struct asd_ascb, list); struct asd_dma_tok t = ascb->dma_scb; memcpy(seq->next_scb.vaddr, ascb->scb, sizeof(*ascb->scb)); ascb->dma_scb = seq->next_scb; ascb->scb = ascb->dma_scb.vaddr; seq->next_scb = t; last->scb->header.next_scb = cpu_to_le64(((u64)seq->next_scb.dma_handle)); } /** * asd_start_timers -- (add and) start timers of SCBs * @list: pointer to struct list_head of the scbs * @to: timeout in jiffies * * If an SCB in the @list has no timer function, assign the default * one, then start the timer of the SCB. This function is * intended to be called from asd_post_ascb_list(), just prior to * posting the SCBs to the sequencer. */ static void asd_start_scb_timers(struct list_head *list) { struct asd_ascb *ascb; list_for_each_entry(ascb, list, list) { if (!ascb->uldd_timer) { ascb->timer.data = (unsigned long) ascb; ascb->timer.function = asd_ascb_timedout; ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT; add_timer(&ascb->timer); } } } /** * asd_post_ascb_list -- post a list of 1 or more aSCBs to the host adapter * @asd_ha: pointer to a host adapter structure * @ascb: pointer to the first aSCB in the list * @num: number of aSCBs in the list (to be posted) * * See queueing comment in asd_post_escb_list(). * * Additional note on queuing: In order to minimize the ratio of memcpy() * to the number of ascbs sent, we try to batch-send as many ascbs as possible * in one go. * Two cases are possible: * A) can_queue >= num, * B) can_queue < num. * Case A: we can send the whole batch at once. Increment "pending" * in the beginning of this function, when it is checked, in order to * eliminate races when this function is called by multiple processes. * Case B: should never happen if the managing layer considers * lldd_queue_size. */ int asd_post_ascb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb, int num) { unsigned long flags; LIST_HEAD(list); int can_queue; spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); can_queue = asd_ha->hw_prof.max_scbs - asd_ha->seq.pending; if (can_queue >= num) asd_ha->seq.pending += num; else can_queue = 0; if (!can_queue) { spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); asd_printk("%s: scb queue full\n", pci_name(asd_ha->pcidev)); return -SAS_QUEUE_FULL; } asd_swap_head_scb(asd_ha, ascb); __list_add(&list, ascb->list.prev, &ascb->list); asd_start_scb_timers(&list); asd_ha->seq.scbpro += num; list_splice_init(&list, asd_ha->seq.pend_q.prev); asd_write_reg_dword(asd_ha, SCBPRO, (u32)asd_ha->seq.scbpro); spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); return 0; } /** * asd_post_escb_list -- post a list of 1 or more empty scb * @asd_ha: pointer to a host adapter structure * @ascb: pointer to the first empty SCB in the list * @num: number of aSCBs in the list (to be posted) * * This is essentially the same as asd_post_ascb_list, but we do not * increment pending, add those to the pending list or get indexes. * See asd_init_escbs() and asd_init_post_escbs(). * * Since sending a list of ascbs is a superset of sending a single * ascb, this function exists to generalize this. More specifically, * when sending a list of those, we want to do only a _single_ * memcpy() at swap head, as opposed to for each ascb sent (in the * case of sending them one by one). That is, we want to minimize the * ratio of memcpy() operations to the number of ascbs sent. The same * logic applies to asd_post_ascb_list(). */ int asd_post_escb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb, int num) { unsigned long flags; spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); asd_swap_head_scb(asd_ha, ascb); asd_ha->seq.scbpro += num; asd_write_reg_dword(asd_ha, SCBPRO, (u32)asd_ha->seq.scbpro); spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); return 0; } /* ---------- LED ---------- */ /** * asd_turn_led -- turn on/off an LED * @asd_ha: pointer to host adapter structure * @phy_id: the PHY id whose LED we want to manupulate * @op: 1 to turn on, 0 to turn off */ void asd_turn_led(struct asd_ha_struct *asd_ha, int phy_id, int op) { if (phy_id < ASD_MAX_PHYS) { u32 v = asd_read_reg_dword(asd_ha, LmCONTROL(phy_id)); if (op) v |= LEDPOL; else v &= ~LEDPOL; asd_write_reg_dword(asd_ha, LmCONTROL(phy_id), v); } } /** * asd_control_led -- enable/disable an LED on the board * @asd_ha: pointer to host adapter structure * @phy_id: integer, the phy id * @op: integer, 1 to enable, 0 to disable the LED * * First we output enable the LED, then we set the source * to be an external module. */ void asd_control_led(struct asd_ha_struct *asd_ha, int phy_id, int op) { if (phy_id < ASD_MAX_PHYS) { u32 v; v = asd_read_reg_dword(asd_ha, GPIOOER); if (op) v |= (1 << phy_id); else v &= ~(1 << phy_id); asd_write_reg_dword(asd_ha, GPIOOER, v); v = asd_read_reg_dword(asd_ha, GPIOCNFGR); if (op) v |= (1 << phy_id); else v &= ~(1 << phy_id); asd_write_reg_dword(asd_ha, GPIOCNFGR, v); } } /* ---------- PHY enable ---------- */ static int asd_enable_phy(struct asd_ha_struct *asd_ha, int phy_id) { struct asd_phy *phy = &asd_ha->phys[phy_id]; asd_write_reg_byte(asd_ha, LmSEQ_OOB_REG(phy_id, INT_ENABLE_2), 0); asd_write_reg_byte(asd_ha, LmSEQ_OOB_REG(phy_id, HOT_PLUG_DELAY), HOTPLUG_DELAY_TIMEOUT); /* Get defaults from manuf. sector */ /* XXX we need defaults for those in case MS is broken. */ asd_write_reg_byte(asd_ha, LmSEQ_OOB_REG(phy_id, PHY_CONTROL_0), phy->phy_desc->phy_control_0); asd_write_reg_byte(asd_ha, LmSEQ_OOB_REG(phy_id, PHY_CONTROL_1), phy->phy_desc->phy_control_1); asd_write_reg_byte(asd_ha, LmSEQ_OOB_REG(phy_id, PHY_CONTROL_2), phy->phy_desc->phy_control_2); asd_write_reg_byte(asd_ha, LmSEQ_OOB_REG(phy_id, PHY_CONTROL_3), phy->phy_desc->phy_control_3); asd_write_reg_dword(asd_ha, LmSEQ_TEN_MS_COMINIT_TIMEOUT(phy_id), ASD_COMINIT_TIMEOUT); asd_write_reg_addr(asd_ha, LmSEQ_TX_ID_ADDR_FRAME(phy_id), phy->id_frm_tok->dma_handle); asd_control_led(asd_ha, phy_id, 1); return 0; } int asd_enable_phys(struct asd_ha_struct *asd_ha, const u8 phy_mask) { u8 phy_m; u8 i; int num = 0, k; struct asd_ascb *ascb; struct asd_ascb *ascb_list; if (!phy_mask) { asd_printk("%s called with phy_mask of 0!?\n", __func__); return 0; } for_each_phy(phy_mask, phy_m, i) { num++; asd_enable_phy(asd_ha, i); } k = num; ascb_list = asd_ascb_alloc_list(asd_ha, &k, GFP_KERNEL); if (!ascb_list) { asd_printk("no memory for control phy ascb list\n"); return -ENOMEM; } num -= k; ascb = ascb_list; for_each_phy(phy_mask, phy_m, i) { asd_build_control_phy(ascb, i, ENABLE_PHY); ascb = list_entry(ascb->list.next, struct asd_ascb, list); } ASD_DPRINTK("posting %d control phy scbs\n", num); k = asd_post_ascb_list(asd_ha, ascb_list, num); if (k) asd_ascb_free_list(ascb_list); return k; }